package com.epfuse.cloud.auth.support.handler;

import com.epfuse.cloud.admin.api.entity.SysLog;
import com.epfuse.cloud.common.core.util.SpringContextHolder;
import com.epfuse.cloud.common.log.event.LogEvent;
import com.epfuse.cloud.common.log.util.SysLogUtils;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServletServerHttpResponse;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.oauth2.core.OAuth2AccessToken;
import org.springframework.security.oauth2.core.OAuth2RefreshToken;
import org.springframework.security.oauth2.core.endpoint.OAuth2AccessTokenResponse;
import org.springframework.security.oauth2.core.http.converter.OAuth2AccessTokenResponseHttpMessageConverter;
import org.springframework.security.oauth2.server.authorization.authentication.OAuth2AccessTokenAuthenticationToken;
import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
import org.springframework.util.CollectionUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.time.temporal.ChronoUnit;
import java.util.Map;

/**
 * @Author : 孙峰
 * @Description:
 * @Date : 2022/7/18  14:42
 */
@Slf4j
public class EpfuseAuthenticationSuccessEventHandler implements AuthenticationSuccessHandler {
    private final HttpMessageConverter<OAuth2AccessTokenResponse> accessTokenHttpResponseConverter = new OAuth2AccessTokenResponseHttpMessageConverter();

    /**
     * Called when a user has been successfully authenticated.
     * @param request the request which caused the successful authentication
     * @param response the response
     * @param authentication the <tt>Authentication</tt> object which was created during
     * the authentication process.
     */
    @SneakyThrows
    @Override
    public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response,
                                        Authentication authentication) {
        log.info("用户：{} 登录成功", authentication.getPrincipal());
        SecurityContextHolder.getContext().setAuthentication(authentication);
        SysLog logVo = SysLogUtils.getSysLog();
        logVo.setTitle("登录成功");
        // 发送异步日志事件
        Long startTime = System.currentTimeMillis();
        Long endTime = System.currentTimeMillis();
        logVo.setTime(endTime - startTime);
        logVo.setCreateBy(authentication.getName());
        logVo.setUpdateBy(authentication.getName());
        SpringContextHolder.publishEvent(new LogEvent(logVo));

        // 输出token
        sendAccessTokenResponse(request, response, authentication);
    }

    private void sendAccessTokenResponse(HttpServletRequest request, HttpServletResponse response,
                                         Authentication authentication) throws IOException {

        OAuth2AccessTokenAuthenticationToken accessTokenAuthentication = (OAuth2AccessTokenAuthenticationToken) authentication;

        OAuth2AccessToken accessToken = accessTokenAuthentication.getAccessToken();
        OAuth2RefreshToken refreshToken = accessTokenAuthentication.getRefreshToken();
        Map<String, Object> additionalParameters = accessTokenAuthentication.getAdditionalParameters();

        OAuth2AccessTokenResponse.Builder builder = OAuth2AccessTokenResponse.withToken(accessToken.getTokenValue())
                .tokenType(accessToken.getTokenType()).scopes(accessToken.getScopes());
        if (accessToken.getIssuedAt() != null && accessToken.getExpiresAt() != null) {
            builder.expiresIn(ChronoUnit.SECONDS.between(accessToken.getIssuedAt(), accessToken.getExpiresAt()));
        }
        if (refreshToken != null) {
            builder.refreshToken(refreshToken.getTokenValue());
        }
        if (!CollectionUtils.isEmpty(additionalParameters)) {
            builder.additionalParameters(additionalParameters);
        }
        OAuth2AccessTokenResponse accessTokenResponse = builder.build();
        ServletServerHttpResponse httpResponse = new ServletServerHttpResponse(response);

        // 无状态 注意删除 context 上下文的信息
        SecurityContextHolder.clearContext();
        this.accessTokenHttpResponseConverter.write(accessTokenResponse, null, httpResponse);
    }

}
